<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <input v-model.number.trim.lazy="num1" type="text" />
      <span>+</span>
      <input v-model.number.trim.lazy="num2" type="text" />
      <span>=</span>
      <span>{{num1+num2}}</span>
      <div>
        <!-- 修饰符也可以连用，没有顺序之分 -->
        <input type="text" v-model.trim.lazy="msg" />
        <p>{{msg}}</p>
      </div>
    </div>
    <script src="./vue.js"></script>
    <script>
      new Vue({
        el: "#app",
        data: {
          num1: 0,
          num2: 0,
          msg: "",
        },
      });
    </script>
  </body>
</html>
